Selected aspects related to the calculations and design of a cryogenic transfer line

This paper presents the results of calculations of a planned helium transfer line operating at cryogenic temperatures as low as 4.5 K. A strength analysis was conducted for the cryogenic transfer line designed to transport supercritical and gaseous helium. The strength analysis of a transfer line operating at extremely low temperatures was conducted using the Finite Element Method (FEM) for complex boundary conditions. The results of numerical calculations served as the basis for the design documentation of the XATL1 cryogenic line to be installed at DESY site.